JP6534177B1 - Aerated structure - Google Patents

Abstract

The present invention provides an aerated structure which is simple in construction and suitable for miniaturization. SOLUTION: A water passage 27 for circulating water toward a water discharge port and causing a venturi effect by the water flow, and external air flowing into an air inlet 43 by a negative pressure due to the venturi effect through an air outlet 44 a water passage 27 and an air passage for supplying the air. A lip packing 51 is disposed in the air passage so that the lip thereof is on the air outlet 44 side. When the water in the water passage 27 flows into the air passage, the lip of the lip packing 51 is pressed against the passage wall of the air passage to close the air passage. On the other hand, when the water is flowing through the water passage, the negative pressure separates the lip from the passage wall to allow the flow of air from the air inlet 43 to the air outlet 44. [Selected figure] Figure 2

Description

  The present invention relates to an aerated structure that mixes air with water.

  There is a shower apparatus provided with an aeration structure for mixing air in hot water or cold water (not specifically distinguished in the present specification and simply referred to as “water”) in a shower head and discharging aerated water from a water outlet of the shower head. The aeration structure in the shower apparatus includes an air passage that joins the water flow passage in the shower head, and is configured to draw air from the outside into the passage and mix it with water in the water flow passage (for example, a patent) Reference 1).

  According to the aeration structure, the comfort when the shower water touches the skin can be enhanced, and a water saving effect can be expected. However, when the water stop mechanism for temporary water stop is mounted on the shower head, there is a possibility that the water in the water flow passage leaks to the outside through the air passage. That is, when water is temporarily stopped on the shower head side by the above water stopping mechanism while water supply to the shower head is continued, the pressure in the water flow channel is increased, so that the water flows into the air passage, and the passage There was a risk of flowing back to the outside.

  Therefore, in Patent Document 2, while forming a tapered hole whose diameter decreases toward the upstream side of the air flow in the air passage, a ball valve for opening and closing the tapered hole is incorporated in the air passage to reverse the air passage. An aerated structure having a stop mechanism has been proposed. In the use state of the shower, this aerated structure allows air to flow by separating the ball valve from the tapered hole, while in the temporary water stop state, the ball valve is pushed by the backflow water in the air passage. The tapered hole is closed to prevent backflow water from flowing out.

Patent 4438209 gazette Patent No. 5007769

  However, in the aeration structure of Patent Document 2, not only the structure of the air passage is complicated by the non-return mechanism using the ball valve, but the ball valve extends in the direction orthogonal to the water flow passage and the diameter is enlarged. It will

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an aerated structure that is suitable for a simple configuration and miniaturization.

The present invention
A water passage for circulating water toward the spout and causing a venturi effect by the water flow;
An air passage having an inlet through which air can flow from the outside and an outlet opening into the water passage;
Equipped with
The aeration structure is such that external air drawn in from the inlet by negative pressure due to the venturi effect is supplied to the water passage through the outlet, and aerated water is discharged from the water outlet.
A lip packing is disposed in the air passage such that the lip portion is on the outlet side,
In the lip packing, when water in the water passage flows into the air passage, the lip portion is pressed against the passage wall of the air passage to close the air passage, and the water passage is closed by the water discharge port. When the water is flowing toward the surface, the negative pressure separates the lip and the passage wall, or the pressing force of the lip against the passage wall weakens the outlet from the inlet. It is characterized in that it allows the flow of air to the part.

  In the above invention, the temporary water stop is performed by the water stop function as described in the background art, and when the flow of water in the water passage stops and the pressure becomes high, the water flows out from the water passage into the air passage, The outlet side (water passage side) is higher in pressure than the lip packing in the passage. In this case, the lip portion is pressed against the passage wall of the air passage to close the air passage, and the backflow water leakage is suppressed. On the other hand, when water is flowing through the water passage, the outlet portion side of the air passage has a negative pressure than the lip packing due to the venturi effect. And, by the gap being formed between the lip portion and the passage wall or the pressing force of the lip portion against the passage wall of the air passage being weakened, the flow of air in the air passage is inhibited by the lip packing. There is no As a result, air is drawn into the water flow path through the air passage, and aerated water is discharged from the water outlet. Therefore, the configuration of the air passage and the non-return structure is simplified as compared with the conventional aeration structure that requires the incorporation of the ball valve into the air passage, and the configuration is suitable for downsizing.

The whole block diagram of a shower apparatus. (A) is a back side perspective view of a water flow adapter, (b) is a longitudinal cross-sectional view. (A) is a longitudinal cross-sectional view of a connection main body, (b) is a partial expanded sectional view of the water flow adapter in the state which abbreviate | omitted lip packing. (A) is a back side perspective view of a channel | path formation member, (b) is a longitudinal cross-sectional view, (c) is a BB sectional drawing of (b). (A) is a perspective view of lip packing, (b) is a longitudinal cross-sectional view, (c) is an enlarged view of A part of FIG.2 (b). The figure which shows the appearance of the lip packing in use condition. The longitudinal cross-sectional view which shows the modification of a water flow adapter.

  Hereinafter, an embodiment of the present invention will be described based on the drawings. Here, first, the entire configuration of the shower apparatus 10 to which the aeration structure of the present invention is applied will be described with reference to FIG.

  The shower apparatus 10 includes a faucet 11 for supplying hot water or water (hereinafter simply referred to as "water"), a shower hose 12 having one end connected to the faucet 11, and a shower connected to the other end of the shower hose 12 And a head 13. The water flow path 14 which distribute | circulates water toward the spout 13a of the shower head 13 is comprised by these, By switching the operation handle 11a of the faucet 11 from a closed position to an open position, from the spout 13a Shower water is discharged.

  A water flow adapter 15 as an aeration structure is connected between the water faucet 11 and the shower hose 12, that is, at an intermediate position of the water flow path 14. The water flow adapter 15 is for mixing air into the water flowing through the water flow path 14 and discharging aerated water from the water discharge port 13 a of the shower head 13.

  The shower head 13 is provided with a water stop button 13 b for temporary water stop. The water flow path 14 can be closed inside the shower head 13 by switching the water stop button 13 b from the discharge position to the water stop position. As a result, even when the operation handle 11a of the water faucet 11 is in the open position, the discharge of the shower water from the water discharge port 13a can be stopped.

  Next, the water flow adapter 15 as the aeration structure will be described with reference to FIGS. 2 to 4. As shown in FIG. 2 (b), the water flow adapter 15 includes a connection main body 21 and a passage forming member 22 detachably mounted on the connection main body 21. The connection body 21 and the passage forming member 22 are formed of, for example, a synthetic resin.

  As shown to Fig.3 (a), the screw parts 23a and 23b for connecting the water flow adapter 15 to the faucet 11 and the shower hose 12 respectively are provided in the both ends of the length direction in the connection main body 21. There is. The connection main body 21 has a substantially cylindrical shape, and a first through hole (attachment hole) 24 which penetrates the connection main body 21 in the length direction (flowing water flow direction of the water flow path 14) is formed inside thereof. The passage forming member 22 is inserted into the first through hole 24 as shown in FIG.

  The passage forming member 22 is formed with a second through hole 25 penetrating the passage forming member 22 in the length direction, and the water supplied from the water faucet 11 is made to the shower hose 12 by the second through hole 25. A water passage 27 is provided to lead out. The water passage 27 constitutes a part of the flowing water passage 14 shown in FIG.

  As shown in FIG. 4 (b), the water passage 27 opens at the end of the water passage 27 on the upstream side (faucet 11 side) toward the faucet 11, and receives the water supplied from the faucet 11. The unit 28 is provided. The opening diameter of the receiving portion 28 corresponds to the opening diameter of the elbow pipe 11b (FIG. 1) of the water tap 11 to which the water flow adapter 15 is connected, and is substantially the same as the opening diameter of the elbow pipe 11b.

  On the downstream side of the receiving portion 28, a narrowed portion 29 in communication with the receiving portion 28 and having a smaller passage diameter than the receiving portion 28 is formed. The throttling portion 29 is formed of a tapered first throttling portion 29a whose passage diameter is reduced toward the downstream side, and a substantially linear second throttling portion 29b which is disposed on the downstream side of the first throttling portion 29a. It is configured. The shape of the throttling portion 29 is not limited to the above as long as the passage diameter is smaller than that of the receiving portion 28.

  On the downstream side of the throttling portion 29, the outlet portion 30 which opens at the end of the downstream side (the shower hose 12 side) of the water passage 27 opens on the shower hose side and draws the water having passed through the throttling portion 29 to the shower hose 12. It is formed. The lead-out portion 30 communicates with the throttling portion 29 and has a passage diameter larger than that of the throttling portion 29. In the present embodiment, the lead-out portion 30 has a tapered shape in which the passage diameter increases toward the downstream side, but the shape is arbitrary, and it is sufficient if the passage diameter is larger than the throttle portion 29. .

  Here, the water flow adapter 15 according to the present embodiment is configured to be capable of taking in external air and supplying it into the water passage 27. Hereinafter, the structure of the air passage for that will be described.

  As shown in FIGS. 4 (a) and 4 (b), the passage forming member 22 is downstream of the substantially cylindrical enlarged diameter portion 33 and the enlarged diameter portion 33 in order from the upstream side to the downstream side of the water passage 27. And a substantially round rod-like shaft portion 34 extending toward the side. The shaft portion 34 has a diameter smaller than that of the enlarged diameter portion 33 and is disposed concentrically with the enlarged diameter portion 33. A disc-like flange portion 35 projecting outward in the radial direction of the shaft portion 34 is provided at an intermediate position in the length direction of the shaft portion 34, and between the flange portion 35 and the enlarged diameter portion 33, An annular recess 36 is formed which has an annular shape surrounding the water passage 27 and which opens outward. The outer diameter D1 (FIG. 4C) of the flange portion 35 is smaller than the outer diameter D2 of the enlarged diameter portion 33. The enlarged diameter portion 33, the shaft portion 34 and the flange portion 35 are integrally formed.

  On the other hand, in the first through holes 24 formed in the connection main body 21, as shown in FIG. 3A, the first step 25a and the second step 25b are provided in the length direction. A first hole 37, a second hole 38, and a third hole 39 are formed by the step portions 25a and 25b, in which the hole diameter gradually decreases from the upstream side to the downstream side.

  The diameter D3 of the first hole 37 is slightly larger than the outer diameter D2 of the enlarged diameter portion 33 of the passage forming member 22, and the enlarged diameter portion 33 can be accommodated inside the first hole 37. There is. As shown in FIG. 2B, in the inserted state of the passage forming member 22, the enlarged diameter portion 33 of the passage forming member 22 abuts on the first step 25a of the first through hole 24 in the connection main body 21, thereby The depth position of the passage forming member 22 is defined.

  The hole diameter D4 of the second hole 38 is larger than the outer diameter D1 of the flange 35 of the passage forming member 22, and the depth dimension H1 of the second hole 38 is the height of the flange 35 from the enlarged diameter portion 33. It is larger than the dimension H2 (FIG. 4 (b)). Therefore, as shown in FIG. 3 (b), a gap is formed between the outer peripheral surface of the flange 35 and the peripheral surface 38a of the second hole 38 and between the flange 35 and the second step 25b. 41 and 42 are formed. Further, the circumferential surface 38a of the second hole 38 faces the annular recess 36 between the flange 35 and the enlarged diameter portion 33, so that an annular space 45 in plan view is formed.

  An air inlet (inlet portion) 43 is provided on the side of the connection body 21 so as to communicate with the space 45. Further, an air outlet (outlet portion) 44 communicating with the gap 42 is provided in the shaft portion 34 of the passage forming member 22. The air outlet 44 opens into the narrowed portion 29 of the water passage 27.

  With the above configuration, air flows in from the air inlet 43, and the air passage 46 is formed to flow out from the air outlet 44 into the water passage 27 through the space 45 and the gaps 41 and 42. Although the number of the air inlets 43 is one in the present embodiment, the number is arbitrary, and a plurality of the air inlets 43 may be provided. Also, the number of the air outlets 44 is arbitrary, and a single air outlet 44 may be provided.

  The hole diameter D5 of the third hole 39 is substantially the same as the outer diameter (maximum outer diameter) D6 of the shaft 34, and an O-ring 47 made of rubber is provided on the outer peripheral surface of the shaft 34 (FIG. 2 (b)) ) Is attached. The O-ring 47 seals the space between the shaft portion 34 and the third hole 39 and prevents water from flowing into the air passage 46 from the shower hose 12 side.

  In addition, a rubber O-ring 48 is attached to the outer peripheral surface of the enlarged diameter portion 33. Thus, water is prevented from flowing into the air passage 46 from the side of the faucet 11, and the passage forming member 22 is held by the elastic force of the O-ring 47.

  Here, the principle of supplying air to the water passage 27 through the air passage 46 will be described. As described above, the throttling portion 29 is formed at an intermediate position of the water passage 27, and the water received by the receiving portion 28 passes through the throttling portion 29 so that the flow velocity thereof is increased. Along with this, the pressure of the throttling portion 29 is reduced (venturi effect), and the negative pressure is applied to the outside (outside air) of the water flow adapter 15. As a result, external air is sucked from the air inlet 43 and a flow of air is generated through the air passage 46 to the air outlet 44. Thereby, the external air is supplied into the water passage 27.

  As shown in FIGS. 4 (b) and 4 (c), the air outlet 44 has a throttle shape in which the hole diameter decreases toward the water passage 27. Therefore, the air having passed through the air passage 46 is vigorously injected into the water passage 27, and the water flowing through the water passage 27 is uniformly mixed with air.

  By the way, when the operation handle 11a of the faucet 11 shown in FIG. 1 is in the open position and the water stop button 13b of the shower head 13 is switched to the water stop position, water is supplied from the water faucet 11 toward the shower head 13 While continuing to be carried out, water will not be discharged from the water outlet 13a of the shower head 13. In this case, the pressure in the water flow passage 14 is increased, and the pressure in the water passage 27 is also increased in the water flow adapter 15. As a result, the water in the water passage 27 may flow into the air passage 46 from the air outlet 44 and may flow back inside the air passage 46 and leak out.

  Therefore, in the water flow adapter 15 according to the present embodiment, the air passage 46 is provided with a non-return structure in order to prevent the backflow water from leaking to the outside as described above. Hereinafter, this non-return structure will be described with reference to FIG.

  As described above, the air passage 46 includes the air inlet 43, the space 45 (the annular recess 36), the gaps 41 and 42, and the air outlet 44 arranged in order from the upstream side of the air flow. Among them, the space portion 45 and the gap 41 extend in the length direction of the water passage 27 and make the first passage portion 46a (FIG. 3B) which distributes the air flowing into the air inlet 43 in the length direction. The gap 42 extends in a direction intersecting with the length direction, and constitutes a second passage 46 b for introducing the air having passed through the first passage 46 a into the air outlet 44.

  A lip packing 51 having an annular shape in a plan view and having a substantially V-shaped cross section is disposed in the middle of the space 45, that is, the first passage 46a. The lip packing 51 is disposed so that the lip 52 is on the air outlet 44 side and the heel (base) 53 is on the air inlet 43 side, and the annular recess 36 (FIG. 4B) of the passage forming member 22 It is attached to). The lip packing 51 is formed of, for example, a chlorine resistant ethylene propylene diene rubber.

  The inner diameter D7 of the lip packing 51 is slightly smaller than the outer diameter D8 (FIG. 4B) of the shaft portion 34 between the flange portion 35 and the enlarged diameter portion 33, and the height dimension H3 of the lip packing 51 is annular The height dimension H4 of the recess 36 is substantially the same. For this reason, the lip packing 51 is fitted in the annular recess 36 with no rattling in the radial and axial directions.

  The outer diameter D9 of the tip of the outer peripheral side lip portion 54 when the passage forming member 22 is not inserted into the connection main body 21 is the hole diameter D4 of the second hole 38 in the connection main body 21 (FIG. 3A). It is slightly larger than that. For this reason, when the passage forming member 22 is inserted into the connection main body 21, the tip end of the outer peripheral side lip portion 54 abuts on the peripheral surface 38 a of the second hole 38. The boundary between the outer peripheral lip 54 and the heel 53 is a curved surface, and a gap 56 (FIG. 5C) is formed between the second hole 38 and the peripheral surface 38a. There is.

  In the lip packing 51, the height dimension H5 of the outer peripheral side lip portion 54 is smaller than the height dimension H6 of the inner peripheral side lip portion 55, and between the tip of the outer peripheral side lip portion 54 and the flange portion 35. A gap 57 (FIG. 5C) is formed. Therefore, when the water in the water passage 27 flows back through the air passage 46, the back flow water can flow into the groove 58 between the outer lip 54 and the inner lip 55 through the gap 57. It has become. A tapered portion 59 which is inclined downward toward the groove portion 58 is formed at the tip end of the outer peripheral side lip portion 54 over the entire circumference, and the backflow water is suitably guided to the groove portion 58 by the tapered portion 59. be able to.

  Next, the operation of the water flow adapter 15 will be described with reference to FIG. First, the case where the operation handle 11a is in the open position and the water stop button 13b is in the water discharge position will be described with reference to FIG. 6 (a). In this case, the water flows through the water flow passage 14 toward the water outlet 13a, whereby the throttling portion 29 is depressurized by the venturi effect. Thus, air in the space 45 (in the groove 58 of the lip packing 51) is sucked through the gaps 41, 42, 56.

  As a result, the inside of the groove portion 58 has a negative pressure with respect to the air inlet 43 side, and the outer peripheral side lip portion 54 is deformed so as to be separated from the peripheral surface 38 a of the second hole 38. Therefore, a gap 60 is formed between the outer peripheral side lip portion 54 and the peripheral surface 38a, and the air inlet 43 and the air outlet 44 communicate with each other. Accordingly, external air is sucked from the air inlet 43 and flows toward the air outlet 44.

  When the outer peripheral side lip portion 54 is deformed, the outer peripheral side lip portion 54 may come into contact with the flange portion 35, and the deformation may be inhibited. In order to suppress the occurrence of such an inconvenience, it is preferable to reduce the diameter of the flange portion 35 and extend the distance from the tip of the outer peripheral side lip portion 54. However, in this case, since the distance between the outer peripheral surface of the flange portion 35 and the peripheral surface 38a of the second hole 38 is increased, the gap 41 (FIG. 3B) becomes large and air tends to flow excessively. As a result, the proportion of air in the water passage 27 becomes high, and there is a concern that the air can not be sucked efficiently.

  In view of this point, in the present embodiment, as shown in FIG. 4C, a notch 49 is formed in the peripheral edge of the flange 35, and the projecting dimension of the flange 35 is partially reduced. Thereby, when the outer peripheral side lip portion 54 is deformed in the formation region of the notch portion 49, interference with the flange portion 35 is suitably avoided, while in the other region, the peripheral surface 38a of the second hole 38 As a result of the narrow distance (size of the gap 41) being maintained, the flow of air is appropriately restricted. With such a configuration, excessive flow of air into the water passage 27 can be avoided while appropriately securing the air flow path.

  Further, the air flowing in from the air inlet 43 circulates through the gap 56 formed between the heel portion 53 of the lip packing 51 and the peripheral surface 38 a of the second hole 38, and the entire circumference of the lip packing 51 is It is supposed to go around. Thus, even when the notch 49 of the flange 35 is not in a positional relationship facing the air inlet 43, air can be suitably guided to the formation region of the notch 49. That is, it is possible to preferably form the air flow path without requiring the circumferential positioning of the connection main body 21 and the passage forming member 22.

  After the air flow path is secured as described above, the air flowing into the gap 60 presses the outer peripheral lip 54 toward the inner peripheral lip 55, and the deformed state of the outer peripheral lip 54 is maintained. Be done. Thus, the flow of air from the air inlet 43 toward the air outlet 44 is maintained without the gap 60 being closed.

  Next, the case where the operation handle 11a is in the open position and the water stop button 13b is in the water stop position will be described with reference to FIG. 6 (b). In this case, the water is supplied from the faucet 11, while the water outlet 13a of the shower head 13 is closed, so that the water loses a clearance and the pressure in the water flow passage 14 rises. Along with this, the pressure in the water passage 27 of the water flow adapter 15 also rises, and the water in the water passage 27 flows from the air outlet 44 into the air passage 46.

  The water having flowed into the air passage 46 passes through the gaps 41, 42, and 57, and then is guided toward the groove 58 by the tapered portion 59 formed on the outer peripheral lip 54 of the lip packing 51 and flows into the groove 58. Do. As a result, the pressure in the groove 58 rises and becomes higher than the pressure on the air inlet 43 side, and the outer peripheral side lip 54 is pressed against the peripheral surface 38 a of the second hole 38. Thereby, the gap between the outer peripheral side lip portion 54 and the peripheral surface 38 a is sealed, and the air passage 46 is closed. Therefore, the backflow water flowing back in the air passage 46 is suppressed from leaking out of the air inlet 43.

  Here, in the present embodiment, the air inlet 43 is configured to open at the height position of the heel portion 53 of the lip packing 51. In this case, the distance L from the tip of the outer peripheral lip 54 to the air inlet 43 is increased, and the seal by the outer peripheral lip 54 on the upstream side of the air inlet 43 (upstream as viewed from the backflow water flow) A large area can be secured. Thus, the air passage 46 can be strongly closed in front of the air inlet 43, and the backflow water can be suitably suppressed from reaching the air inlet 43.

  According to the embodiment described above, the following excellent effects can be obtained.

  The lip packing 51 is disposed in the air passage 46 so that the lip 52 is on the air outlet 44 side of the air passage 46. In this configuration, when water stop is performed by the water stop button 13 b and the flow of water in the water passage 27 stops and the state of high pressure is reached, water flows out from the water passage 27 to the air passage 46. The air outlet 44 side (water passage 27 side) is higher in pressure than the lip packing 51. In this case, the outer peripheral side lip portion 54 is pressed against the peripheral surface 38a of the second hole 38 (the passage wall of the air passage 46) to close the air passage 46, and the backflow water is suppressed from leaking.

  On the other hand, when water is flowing through the water passage 27, the air outlet 44 side of the air passage 46 has a negative pressure than the lip packing 51 due to the venturi effect. Then, the gap 60 is formed between the outer peripheral side lip portion 54 and the peripheral surface 38 a, whereby the flow of air in the air passage 46 is not hindered by the lip packing 51. As a result, air is drawn into the water flow path through the air passage 46, and the aerated water is discharged from the water discharge port 13a.

  Therefore, the configuration of the air passage and the non-return structure is simplified as compared with the conventional aeration structure that requires the incorporation of the ball valve into the air passage, and the configuration is suitable for downsizing.

  · As the air passage 46, the first passage portion 46a which extends along the longitudinal direction of the water passage 27 and into which the air flowing into the air inlet 43 is introduced, and extends in the direction intersecting the longitudinal direction; The second passage 46b is provided to lead the air having passed through the passage 46a to the air outlet 44, and the lip packing 51 is disposed in the first passage 46a so as to surround the water passage 27 in the circumferential direction.

  In this case, since the non-return structure is constructed in the longitudinal direction of the water passage 27, the crossing in the air passage is more than that in the conventional aerated structure in which the non-return structure is constructed in the direction crossing the longitudinal direction of the water passage. The dimension W (FIG. 2 (b)) in the direction of movement can be kept small. This makes it possible to increase the design freedom of the water passage 27 without increasing the outer diameter of the water flow adapter 15.

  That is, when the dimension W becomes large, the formation region of the air passage 46 in the radial direction of the water flow adapter 15 becomes wider toward the inside of the passage formation member 22, and the region usable as the water passage 27 becomes narrower accordingly . As a result, the passage diameter of the water passage 27 may be limited, and the design freedom may be reduced. In this case, although it is also conceivable to secure the formation area of the air passage 46 by enlarging the outer diameter of the water flow adapter 15, other water flow pipes (elbow pipe 11b and shower hose 12 to which the water flow adapter 15 is connected) are considered. Due to the relationship with the above, there is a limit in expanding the outer diameter of the water flow adapter 15.

  In this respect, in the present embodiment in which the dimension W can be reduced, the formation area of the air passage 46 can be prevented from expanding toward the inside of the passage forming member 22, so that the water passage can be obtained without expanding the adapter outer diameter. 27 can secure a wide usable area. Therefore, it is possible to increase the design freedom of the water passage 27 without increasing the adapter outer diameter.

  -The connection main body 21 in which the first through hole 24 penetrating in the flow direction of the water flow path 14 is formed, and the passage forming member 22 in which the water passage 27 for producing the venturi effect is formed The passage forming member 22 can be mounted in the through hole 24.

  As described above, since the function as the water passage 27 is concentrated on the passage forming member 22 side, only the passage forming member 22 is replaced, so that the receiving portion 28 and the throttling portion 29 in the water passage 27 can pass through. The road diameter can be changed. That is, the water pressure on the side of the faucet 11 may differ depending on the specification of the faucet 11, etc. In such a case, it is necessary to adjust the passage diameter of the receiving portion 28 etc. according to the water pressure of the faucet used. In this regard, in the present embodiment, it is possible to flexibly cope with such a situation.

  In addition, since the functions as connection parts (screw parts 23a and 23b) with the faucet 11 and the shower hose 12 are concentrated on the connection main body 21 side, only the connection main body 21 is replaced except between the water faucet 11 and the shower hose 12 It is possible to connect the water flow adapter 15 also to the point (for example, between the shower head 13 and the shower hose 12).

  -After the water flow adapter 15 can be separated into the connection body 21 and the passage forming member 22, an air passage is formed at the boundary between them (between the peripheral surface of the first through hole 24 and the outer edge of the passage forming member 22). A part of the 46 (the first passage portion 46a and the second passage portion 46b) is formed, and the lip packing 51 is disposed in the portion.

  In this case, if the passage forming member 22 is separated from the connection main body 21, the lip packing 51 can be easily attached. Thereafter, when the passage forming member 22 to which the lip packing 51 is attached is inserted into the connection main body 21, the lip packing 51 is disposed in the air passage 46, so that the assembly can be completed by an extremely simple operation. That is, although the check valve is incorporated in the air passage, the assembling operation can be made easy. As a result, it is possible to simplify the assembling operation as compared with the conventional aeration structure in which the passage-like long hole is bored to form the air passage and the ball valve is inserted into the passage from the opening thereof. It becomes possible to improve the workability.

  In the present embodiment, the first passage portion 46a and the second passage portion 46b of the air passage 46 are formed at the boundary portion, but in view of the ease of attachment of the lip packing 51, at least One passage portion 46a (more specifically, at least a portion where the lip packing 51 is disposed) may be formed at the boundary portion.

<Other Embodiments>
The present invention is not limited to the above embodiment, and may be implemented, for example, as follows.

  In the above embodiment, the lip packing 51 is attached to the passage forming member 22. However, as shown in FIG. 7, the lip packing 51 may be attached to the connection main body 21. Note that, comparing the above embodiment with the modification of FIG. 7, the above embodiment has the following advantages.

  In the configuration in which the lip packing 51 is attached to the connection main body 21, when the passage forming member 22 is extracted from the connection main body 21, the lip packing 51 remains on the connection main body 21 side (FIG. 7 (b)). Is difficult. On the other hand, in the configuration in which the lip packing 51 is attached to the annular recess 36 of the passage forming member 22, the lip packing 51 is extracted together with the passage forming member 22, so the lip packing 51 can be easily taken out. Thereby, the effort at the time of replacing | exchanging the channel | path formation member 22 is reduced, and workability | operativity improves.

  Moreover, in the above embodiment, since the lip packing 51 is fitted in the annular recess 36 and the lip packing 51 is held by the passage forming member 22, the lip packing 51 falls off in the middle of the extraction operation and the assembling operation. Is prevented. This makes it possible to further improve the workability.

  In the above embodiment, when the water flows through the water passage 27 and becomes negative pressure, the lip packing 51 is deformed so that the outer peripheral side lip portion 54 is separated from the peripheral surface 38 a of the second hole portion 38. Thus, the gap 60 is formed to allow the flow of air from the air inlet 43 to the air outlet 44. However, the pressing force against the circumferential surface 38a of the outer peripheral side lip portion 54 is the negative pressure. It may be configured to be weakened (smaller than the closed state of the air passage 46). Even in this case, the outer peripheral side lip portion 54 in a state in which the pressing force is reduced is pushed toward the inner peripheral side lip portion 55 by the air from the outside, so that a gap can be generated. The flow of air to the outlet 44 can be tolerated.

  In the above embodiment, although the air mixing structure is configured separately from the shower head 13 and the shower hose 12, the shower head 13 and the shower hose 12 may be integrated and integrated in the connection portion (nipple or the like). It may be

  In the above embodiment, the aeration structure is applied to the shower device, but may be applied to other than the shower device, such as a cleaning device having a nozzle head connected to the tip of a hose or a watering device for gardening. Also in this case, the air mixing structure is not limited to a case separate from the nozzle head and the hose, and may be incorporated inside the nozzle head and the hose connection portion.

  13a: water outlet, 15: water flow adapter (air mixing structure), 21: connection body (body), 22: passage forming member, 24: first through hole (attachment hole), 27: water passage, 28: receiving portion , 29: throttle portion, 30: outlet portion, 36: annular recess, 38a: circumferential surface (passage wall of air passage), 43: air inlet (inlet portion), 44: air outlet (outlet portion), 46: Air passage, 46a: first passage portion, 46b: second passage portion, 51: lip packing, 52: lip portion.

Claims (5)

A water passage for circulating water toward the spout and causing a venturi effect by the water flow;
An air passage having an inlet through which air can flow from the outside and an outlet opening into the water passage;
Equipped with
The aeration structure is such that external air drawn in from the inlet by negative pressure due to the venturi effect is supplied to the water passage through the outlet, and aerated water is discharged from the water outlet.
A lip packing is disposed in the air passage such that the lip portion is on the outlet side,
In the lip packing, when water in the water passage flows into the air passage, the lip portion is pressed against the passage wall of the air passage to close the air passage, and the water passage is closed by the water discharge port. When the water is flowing toward the surface, the negative pressure separates the lip and the passage wall, or the pressing force of the lip against the passage wall weakens the outlet from the inlet. An aerated structure characterized in that it allows the flow of air to a part. The air passage is
A first passage portion extending in the longitudinal direction of the water passage and into which the air flowing into the inlet portion is introduced;
A second passage portion extending in a direction intersecting with the longitudinal direction and for leading the air having passed through the first passage portion to the outlet portion;
Equipped with
The aeration structure according to claim 1, wherein the lip packing is disposed in the first passage portion so as to surround the water passage in the circumferential direction. A main body having a mounting hole penetrating in the flowing direction of the water passage;
A passage forming member configured to be removable within the mounting hole and in which the water passage is formed;
Equipped with
The water passage is
A receiving unit for receiving water from the upstream side of the water passage;
A throttling portion in communication with the receiving portion and having a passage diameter smaller than the receiving portion;
A discharge portion communicating with the throttling portion, having a passage diameter larger than the throttling portion, and discharging the water having passed through the throttling portion to the water discharge port side;
The aerated structure according to claim 1 or 2, comprising: The passage forming member has an annular shape that circumferentially surrounds the water passage, and includes an annular recess opening radially outward of the water passage,
The aeration structure according to claim 3, wherein the lip packing is attached to the annular recess.   The aeration structure according to any one of claims 1 to 4, wherein the water discharge port is a water discharge port of a shower head.